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feat: add new lc problems: No.3050~3060 (#2381)
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‎solution/3000-3099/3050.Pizza Toppings Cost Analysis/README.md

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# [3050. Pizza Toppings Cost Analysis](https://leetcode.cn/problems/pizza-toppings-cost-analysis)
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[English Version](/solution/3000-3099/3050.Pizza%20Toppings%20Cost%20Analysis/README_EN.md)
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<!-- tags: -->
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## 题目描述
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<!-- 这里写题目描述 -->
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<p>Table: <code><font face="monospace">Toppings</font></code></p>
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<pre>
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+--------------+---------+
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| Column Name | Type |
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+--------------+---------+
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| topping_name | varchar |
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| cost | decimal |
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+--------------+---------+
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topping_name is the primary key for this table.
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Each row of this table contains topping name and the cost of the topping.
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</pre>
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<p>Write a solution to calculate the <strong>total cost</strong> of <strong>all possible <code>3</code>-topping</strong> pizza combinations from a given list of toppings. The total cost of toppings must be <strong>rounded</strong> to <code>2</code> <strong>decimal</strong> places.</p>
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<p><strong>Note:</strong></p>
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<ul>
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<li><strong>Do not</strong> include the pizzas where a topping is <strong>repeated</strong>. For example, &lsquo;Pepperoni, Pepperoni, Onion Pizza&rsquo;.</li>
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<li>Toppings <strong>must be</strong> listed in <strong>alphabetical order</strong>. For example, &#39;Chicken, Onions, Sausage&#39;. &#39;Onion, Sausage, Chicken&#39; is not acceptable.</li>
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</ul>
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<p>Return<em> the result table ordered by total cost in</em> <em><strong>descending</strong></em> <em>order and combination of toppings in <strong>ascending</strong> order.</em></p>
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<p>The result format is in the following example.</p>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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Toppings table:
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+--------------+------+
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| topping_name | cost |
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+--------------+------+
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| Pepperoni | 0.50 |
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| Sausage | 0.70 |
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| Chicken | 0.55 |
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| Extra Cheese | 0.40 |
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+--------------+------+
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<strong>Output:</strong>
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+--------------------------------+------------+
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| pizza | total_cost |
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+--------------------------------+------------+
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| Chicken,Pepperoni,Sausage | 1.75 |
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| Chicken,Extra Cheese,Sausage | 1.65 |
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| Extra Cheese,Pepperoni,Sausage | 1.60 |
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| Chicken,Extra Cheese,Pepperoni | 1.45 |
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+--------------------------------+------------+
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<strong>Explanation:</strong>
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There are only four different combinations possible with the three topings:
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- Chicken, Pepperoni, Sausage: Total cost is $1.75 (Chicken $0.55, Pepperoni $0.50, Sausage $0.70).
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- Chicken, Extra Cheese, Sausage: Total cost is $1.65 (Chicken $0.55, Extra Cheese $0.40, Sausage $0.70).
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- Extra Cheese, Pepperoni, Sausage: Total cost is $1.60 (Extra Cheese $0.40, Pepperoni $0.50, Sausage $0.70).
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- Chicken, Extra Cheese, Pepperoni: Total cost is $1.45 (Chicken $0.55, Extra Cheese $0.40, Pepperoni $0.50).
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Output table is ordered by the total cost in descending order.</pre>
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## 解法
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### 方法一
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<!-- tabs:start -->
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```sql
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/3000-3099/3050.Pizza Toppings Cost Analysis/README_EN.md

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# [3050. Pizza Toppings Cost Analysis](https://leetcode.com/problems/pizza-toppings-cost-analysis)
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[中文文档](/solution/3000-3099/3050.Pizza%20Toppings%20Cost%20Analysis/README.md)
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<!-- tags: -->
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## Description
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<p>Table: <code><font face="monospace">Toppings</font></code></p>
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<pre>
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+--------------+---------+
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| Column Name | Type |
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+--------------+---------+
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| topping_name | varchar |
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| cost | decimal |
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+--------------+---------+
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topping_name is the primary key for this table.
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Each row of this table contains topping name and the cost of the topping.
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</pre>
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<p>Write a solution to calculate the <strong>total cost</strong> of <strong>all possible <code>3</code>-topping</strong> pizza combinations from a given list of toppings. The total cost of toppings must be <strong>rounded</strong> to <code>2</code> <strong>decimal</strong> places.</p>
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<p><strong>Note:</strong></p>
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<ul>
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<li><strong>Do not</strong> include the pizzas where a topping is <strong>repeated</strong>. For example, &lsquo;Pepperoni, Pepperoni, Onion Pizza&rsquo;.</li>
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<li>Toppings <strong>must be</strong> listed in <strong>alphabetical order</strong>. For example, &#39;Chicken, Onions, Sausage&#39;. &#39;Onion, Sausage, Chicken&#39; is not acceptable.</li>
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</ul>
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<p>Return<em> the result table ordered by total cost in</em> <em><strong>descending</strong></em> <em>order and combination of toppings in <strong>ascending</strong> order.</em></p>
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<p>The result format is in the following example.</p>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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Toppings table:
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+--------------+------+
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| topping_name | cost |
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+--------------+------+
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| Pepperoni | 0.50 |
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| Sausage | 0.70 |
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| Chicken | 0.55 |
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| Extra Cheese | 0.40 |
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+--------------+------+
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<strong>Output:</strong>
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+--------------------------------+------------+
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| pizza | total_cost |
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+--------------------------------+------------+
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| Chicken,Pepperoni,Sausage | 1.75 |
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| Chicken,Extra Cheese,Sausage | 1.65 |
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| Extra Cheese,Pepperoni,Sausage | 1.60 |
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| Chicken,Extra Cheese,Pepperoni | 1.45 |
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+--------------------------------+------------+
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<strong>Explanation:</strong>
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There are only four different combinations possible with the three topings:
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- Chicken, Pepperoni, Sausage: Total cost is $1.75 (Chicken $0.55, Pepperoni $0.50, Sausage $0.70).
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- Chicken, Extra Cheese, Sausage: Total cost is $1.65 (Chicken $0.55, Extra Cheese $0.40, Sausage $0.70).
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- Extra Cheese, Pepperoni, Sausage: Total cost is $1.60 (Extra Cheese $0.40, Pepperoni $0.50, Sausage $0.70).
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- Chicken, Extra Cheese, Pepperoni: Total cost is $1.45 (Chicken $0.55, Extra Cheese $0.40, Pepperoni $0.50).
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Output table is ordered by the total cost in descending order.</pre>
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## Solutions
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### Solution 1
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<!-- tabs:start -->
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```sql
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/3000-3099/3051.Find Candidates for Data Scientist Position/README.md

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# [3051. Find Candidates for Data Scientist Position](https://leetcode.cn/problems/find-candidates-for-data-scientist-position)
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[English Version](/solution/3000-3099/3051.Find%20Candidates%20for%20Data%20Scientist%20Position/README_EN.md)
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<!-- tags: -->
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## 题目描述
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<!-- 这里写题目描述 -->
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<p>Table: <font face="monospace"><code>Candidates</code></font></p>
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<pre>
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+--------------+---------+
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| Column Name | Type |
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+--------------+---------+
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| candidate_id | int |
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| skill | varchar |
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+--------------+---------+
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(candidate_id, skill) is the primary key (columns with unique values) for this table.
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Each row includes candidate_id and skill.
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</pre>
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<p>Write a query to find the <strong>candidates</strong> best suited for a Data Scientist position. The candidate must be proficient in <strong>Python</strong>, <strong>Tableau</strong>, and <strong>PostgreSQL</strong>.</p>
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<p>Return <em>the result table ordered by </em><code>candidate_id</code> <em>in <strong>ascending order</strong></em>.</p>
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<p>The result format is in the following example.</p>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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Candidates table:
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+---------------+--------------+
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| candidate_id | skill |
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+---------------+--------------+
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| 123 | Python |
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| 234 | R |
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| 123 | Tableau |
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| 123 | PostgreSQL |
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| 234 | PowerBI |
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| 234 | SQL Server |
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| 147 | Python |
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| 147 | Tableau |
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| 147 | Java |
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| 147 | PostgreSQL |
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| 256 | Tableau |
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| 102 | DataAnalysis |
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+---------------+--------------+
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<strong>Output:</strong>
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+--------------+
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| candidate_id |
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+--------------+
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| 123 |
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| 147 |
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+--------------+
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<strong>Explanation:</strong>
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- Candidates 123 and 147 possess the necessary skills in Python, Tableau, and PostgreSQL for the data scientist position.
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- Candidates 234 and 102 do not possess any of the required skills for this position.
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- Candidate 256 has proficiency in Tableau but is missing skills in Python and PostgreSQL.
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The output table is sorted by candidate_id in ascending order.
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</pre>
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## 解法
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### 方法一
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<!-- tabs:start -->
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```sql
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/3000-3099/3051.Find Candidates for Data Scientist Position/README_EN.md

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# [3051. Find Candidates for Data Scientist Position](https://leetcode.com/problems/find-candidates-for-data-scientist-position)
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[中文文档](/solution/3000-3099/3051.Find%20Candidates%20for%20Data%20Scientist%20Position/README.md)
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<!-- tags: -->
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## Description
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<p>Table: <font face="monospace"><code>Candidates</code></font></p>
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<pre>
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+--------------+---------+
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| Column Name | Type |
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+--------------+---------+
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| candidate_id | int |
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| skill | varchar |
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+--------------+---------+
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(candidate_id, skill) is the primary key (columns with unique values) for this table.
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Each row includes candidate_id and skill.
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</pre>
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<p>Write a query to find the <strong>candidates</strong> best suited for a Data Scientist position. The candidate must be proficient in <strong>Python</strong>, <strong>Tableau</strong>, and <strong>PostgreSQL</strong>.</p>
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<p>Return <em>the result table ordered by </em><code>candidate_id</code> <em>in <strong>ascending order</strong></em>.</p>
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<p>The result format is in the following example.</p>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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Candidates table:
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+---------------+--------------+
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| candidate_id | skill |
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+---------------+--------------+
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| 123 | Python |
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| 234 | R |
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| 123 | Tableau |
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| 123 | PostgreSQL |
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| 234 | PowerBI |
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| 234 | SQL Server |
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| 147 | Python |
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| 147 | Tableau |
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| 147 | Java |
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| 147 | PostgreSQL |
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| 256 | Tableau |
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| 102 | DataAnalysis |
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+---------------+--------------+
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<strong>Output:</strong>
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+--------------+
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| candidate_id |
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+--------------+
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| 123 |
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| 147 |
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+--------------+
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<strong>Explanation:</strong>
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- Candidates 123 and 147 possess the necessary skills in Python, Tableau, and PostgreSQL for the data scientist position.
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- Candidates 234 and 102 do not possess any of the required skills for this position.
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- Candidate 256 has proficiency in Tableau but is missing skills in Python and PostgreSQL.
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The output table is sorted by candidate_id in ascending order.
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</pre>
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## Solutions
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### Solution 1
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<!-- tabs:start -->
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```sql
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```
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<!-- tabs:end -->
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<!-- end -->

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